Mattress cover



FIG. 1 is a perspective view of the mattress cover of the present design;

FIG. 2 is a top view of the mattress cover of FIG. 1 ;

FIG. 3 is a left side view of the mattress cover of FIG. 1 ;

FIG. 4 is a right side view of the mattress cover of FIG. 1 ;

FIG. 5 is a rear view of the mattress cover of FIG. 1 ; and,

FIG. 6 is a front view of the mattress cover of FIG. 1 .

The broken lines shown in the drawings illustrate portions of the mattress cover that form no part of the claimed design. 

CLAIM The ornamental design for a mattress cover, as shown and described. 